Alloy vs Fluid UI

Alloy is a product prototyping and user-testing platform that can work from a connected codebase or capture pages through a browser extension. With a codebase connected, it can run an app and show changes live in a browser. Teams can make interactive prototypes, share them, run sessions and collaborate. The Free plan includes $5 credits per user per month, unlimited sessions and viewers, and 30+ integrations. Alloy lists Linear, Jira, Slack and Intercom among its integrations. Sessions can be exported, accessed through MCP or turned into GitHub pull requests; teams can also push changes to a pull request and roll them out to customers. The browser extension needs no setup. Connecting a codebase requires admin permissions and about 15 minutes. Free has standard support, Pro has priority support, and Enterprise has 24/7 support. Pro costs $20 per user per month. Enterprise pricing is custom and includes API access, an account manager, custom terms, and SAML + SCIM.

Fluid UI is a web-based tool for making, previewing, sharing, and exporting mobile app mockups. It supports interactive web and mobile prototypes with taps, swipes, clicks, and other gestures, plus page effects such as fades, flips, and pop-ins. The built-in library contains more than 2,000 components spanning Material Design, iOS, Windows, and wireframe styles. Teams can collaborate on cloud-saved projects in real time. Reviewer mode supports shared click-throughs, chat, annotations, and comments, and the service also supports remote user testing sessions. Fluid UI runs in Firefox and Chrome, offers an installable desktop client, and has Android and iOS preview apps. There is a free plan and a free trial. Paid plans include Solo at $8.25 a month for five active projects, one user license, and unlimited reviewers; Pro is $19.08 a month, and Team is $41.58 a month.